Answer:
Increase in temperature will not affect a solid - liquid mixture. Example can be taken of salt and water
Name two inputs, two outputs and two side effects of the healthcare system.
Answer:
Healthcare system is one of the most important in any country’s economy.
Health care system Inputs include Medication, patients, locations
Outputs: Treating injured or sick people, taking care of people's health
Side effects: Lack of medication/drugs or no right medication, wrong diagnosis or prescription.
You have a gas at a pressure of 5 atm and a temperature of 300 K, what is the new pressure if the temperature is decreased to 200 K?
Answer:
3.33 atm
Explanation:
P1/T1 = P2/T2
5 atm/ 300 K = P2 /200K
P2 = 5atm*200 K/300 K
P2 = 3.33 atm
Can I Plz Have help?!?!?!?
(Q1) What is the correct value for coefficient (A)?
A. 1
B. 2
C. 3
D. 4
(Q2) What is the correct value for coefficient (B)?
A. 1
B. 2
C. 3
D. 4
(Q3) What is the correct value for coefficient (C)?
A. 1
B. 2
C. 3
D. 4
(Q4)What is the correct value for coefficient (D)?
A. 1
B. 2
C. 3
D. 4
(Q5) If there is enough energy and H2, then how many moles of Sn02 will react with 2 moles of H2 and produce 1 mole of Sn and 2 moles of H2O? How many moles of SnO2 does this balanced equation represent?
A. 0.5
B. 1.0
C. 1.5
D. 2.5
(Q6)The reactants in this equation are _________.
A. SnO2 and Sn
B. Sn and H2O
C. SnO2 and H2
D. H2 and H2O
(Q7)The products in this equation are _________.
A. SnO2 and Sn
B. Sn and H2O
C. SnO2 and H2
D. H2 and H2O
(Q8)This reaction is ___________.
A. endothermic
B. exothermic
Answer:
1. A
2. B
3. A
4. B
5. B
6.C
7. B
8. A
Explanation:
SnO₂ + H₂ + energy → Sn + H₂0
The reaction is between Tin(iv) oxide and hydrogen gas to form tin and water molecules.
Notice the reaction is not balance therefore let us balance the equation. To balance the equation the number of atoms on both side (reactant and product)of the equation must be equal.
SnO₂ +2H₂ → Sn + 2H₂0
The equation is balanced . SnO₂ has coefficient of 1 , H₂ has coefficient of 2, Sn has coefficient of 1 and H₂0 has coefficient of 2.
Q5
SnO₂ + 2H₂→ Sn + 2H₂0
1 moles of SnO₂ will balance the equation
Q6
The reactant is on the left side of the chemical equation. Therefore the reactants are Tin(iv) oxide and hydrogen molecules (SnO₂ and H₂)
Q7
The product is on the right side of the chemical equations .Therefore, the products are Tin and water molecules(Sn and H₂0).
Q8
The reaction is an endothermic reaction because it absorb heat from it environment.
Which of the following best describes bases? A. They feel slippery and taste sour. B. They turn red litmus paper blue and react with metals. C. They taste bitter and react with carbonates. D. They turn red litmus paper blue and taste bitter.
Answer: D. They turn red litmus paper blue and taste bitter.
Explanation:
Acids are those substances which either donates hydrogen ions when dissolved in water. They have pH ranging from 1 to 6.9. They are sour in taste. They dissolve metals to give hydrogen gas. They turn blue litmus red.
Bases are those substances which either donates hydroxide ions when dissolved in water or donates a pair of electrons. They have pH ranging from 7.1 to 14. They are bitter in taste. They are slippery in nature. They turn red litmus blue.
What is potential energy
Potential energy has to do with the energy held
by an object because of its position.
Potential energy is energy that is stored
which can be used to do work.
How can an invasive species like weeds affect crops on a farm?
A) It competes with the crops on that farm for resources.
B) It can turn productive land into unusable land.
C) It overtakes the crop population of that farm.
D) lț can serve as habitat for pests.
E) All of the above
Answer:
E
Explanation:
All of the above
please help I have no idea tbh
Answer: I believe the answer is B. Sorry if i'm wrong
Explanation:
Which of the following contains salt water?
Lake
Ocean
River
Glacier
Answer:
Ocean
Explanation:
The maximum salinity is about 35 parts per mille. Among other terms, around 3.5 per cent of seawater weight is produced from salts dissolved.
So a lot of salt water in oceans
Hope this helps.
Answer:
b)
Explanation:
ocean is a containing salt water
What is the answer I need help I’m stuck
Answer:
Formation of covalent bonds in water
☆CHEERS!☆if the ph of phosphoric acid is 1.5 what is its molarity?
Answer:
0.032 M
Explanation:
pH denotes the acidity or alkalinity of an aqueous solution. pH stands for potential hydrogen. The letter “p” denotes potential and the letter “H” denotes for hydrogen. A pH number varies from 0 to 14 depending upon on how acidic or alkaline a liquid is. Any aqueous solution that has pH above 7 is alkaline and any aqueous solution that has pH below 7 is acidic.
ph of phosphoric acid = 1.5
pH = -log[[tex]H_3O^+[/tex]]
1.5 = -log[[tex]H_3O^+[/tex]]
-1.5 = log[[tex]H_3O^+[/tex]]
[tex][H_3O^+]=10^{-1.5}[/tex] = 0.032 M
A hurricane is destroyed by?
How many molecules are in 7.32 moles of sulfur dioxide?
Answer:
4.41 × 10²⁴ molecules SO₂
General Formulas and Concepts:
Atomic Structure
CompoundsMolesStoichiometry
Using Dimensional AnalysisExplanation:
Step 1: Define
[Given] 7.32 moles SO₂
[Solve] molecules SO₂
Step 2: Identify Conversions
Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.
Step 3: Convert
[DA] Set up: [tex]\displaystyle 7.32 \ moles \ SO_2(\frac{6.022 \cdot 10^{23} \ molecules \ SO_2}{1 \ mol \ SO_2})[/tex][DA] Multiply [Cancel out units]: [tex]\displaystyle 4.4081 \cdot 10^{24} \ molecules \ SO_2[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
4.4081 × 10²⁴ molecules SO₂ ≈ 4.41 × 10²⁴ molecules SO₂
Answer:
4.41 × 10²⁴ molecules SO₂
Explanation:
The Person is right
The SI unit that can be used to express mass is ?
Answer:
why cant I see the picture on my screen
Which one is correct
Answer:
number 3.
Explanation:
Answer:
3
Explanation:
A balloon occupies a volume of 44 L at 200K, what will the temperature of the balloon become if it is changed to 500K?
Answer:
110L
Explanation:
The following data were obtained from the question:
Initial volume (V1) = 44L
Initial temperature (T1) = 200K
Final temperature (T2) = 500K
Final volume (V2) =..?
The new volume of the balloon can be obtained by using Charles' law equation as shown below:
V1/T1 = V2/T2
44/200 = V2/500
Cross multiply
200 x V2 = 44 x 500
Divide both side by 200
V2 = 44 x 500/200
V2 = 110L
Therefore, the new volume of the balloon is 110L
what pressure, in atmospheres is exerted by 0.325 mol of hydrogen gas in a 14.08L container at 35°C ?
Answer:0.58 atm
Explanation:see attached photo
Answer:
[tex]P=0.583atm[/tex]
Explanation:
Hello,
In this case, by using the ideal gas equation:
[tex]PV=nRT[/tex]
We can compute the pressure as shown below, considering the given data and absolute temperature:
[tex]P=\frac{nRT}{V}=\frac{0.325mol*0.082\frac{atm*L}{mol*K}*(35+273)K}{14.08L}\\ \\P=0.583atm[/tex]
Best regards.
If atmospheric pressure measurement for taking at regular intervals from sea level to the stratopause The measurements with most likely show that the pressure
Answer:
Troposphere
Explanation:
The troposphere is the lowest layer of Earth's atmosphere that extends from under the stratosphere down to the surface of the earth. Nearly all weather condition takes place in the troposphere. The troposphere contains about 75% of the atmosphere's mass and 99% of the total mass of water vapour and aerosols in the atmosphere.
Answer: Pressure decreases.
Explanation:
Atmospheric pressure is termed as the downward force applied by the weight of air against a particular area on Earth's surface. the Standard atmospheric pressure is determined by weighing the column of air occupying 1 square inch on Earth's surface which begins at sea level and moves upward to the uppermost layer of the atmosphere
Measuring the Atmospheric pressure from sea level to the stratosphere,the second layer of the atmosphere which contains the most of the ozone gas show that the pressure decreases
Which action is not an accomplishment of the Apollo missions?
to study the surface of the moon
to orbit the Earth for two weeks
to send rovers to the Moon
to land on the moon
Answer:
to send rovers to the Moon.
Explanation:
Apollo refers to the project led by The National Aeronautics and Space Administration (NASA) to study the environment of the Moon in the 1960s and 1970s. Project Apollo 's objectives went beyond landing humans on the moon and getting them back safely to Earth. They included attempting to establish technology to meet other national space interests, to carry out a plan of scientific observation of the Moon, enhancing human capacity to work in the lunar climate, etc.
Answer:
man this was the ONLY question i missed i would have have a 100% accuracy!
Explanation:
if you flirt with someone else is that considered cheating ?
Answer:
Depends how your flirting
Explanation:
Answer:
yes, because if you love someone you wont want anyone else. therefore if you flirt your giving someone else the attention your significant other is suppose to get from you.
Explanation:
010)
Which solution is the most concentrated?
A. 75% isopropyl alcohol
B. 7% isopropyl alcohol
C. 95% isopropyl alcohol
11)
Answer:
C
Explanation:
95 > 7
95 > 75
The answer is C.
i will give the brainliest for who answer this questio but no guessing
Write the common names of group IVA, VIIA and VIII A _____________________ ,
____________________ , _____________________
Answer:
IVA: nonmetal/other metals VIIA:halogens VIII: Nobel Gases
Explanation:makes sense
The pressure inside a sealed container is 97.9 kPa when the temperature is 298 K.
What will the pressure be if the temperature is 376 K?
Answer:
123.5 kPa
Explanation:
P2=P1T2/T1
You can check this by knowing that P and T at constant V have a proportional relationship. Hence, this is correct.
a sample of gas at a pressure of 5.1 atm and a temperature of 45 degrees celsius is heated. it’s pressure goes to 7.8 atm what is it’s new temperature in celsius
Answer:
213.4°C.
Explanation:
Data obtained from the question:
Initial pressure (P1) = 5.1atm
Initial temperature (T1) = 45°C = 45°C + 273 = 318K
Final pressure (P2) = 7.8atm
Final temperature (T2) =..?
The new temperature can be obtained as follow:
P1/T1 = P2 /T2
5.1/318 = 7.8/T2
Cross multiply
5.1 x T2 = 318 x 7. 8
Divide both side by 5.1
T2 = 318 x 7. 8 /5.1
T2 = 486.4K
Finally, we shall convert 486.4K to celsius temperature. This can be done as follow:
T(°C) = T(K) – 273
T(K) = 486.4K
T(°C) = 486.4 – 273
T(°C) = 213.4°C.
Therefore, the new temperature is 213.4°C
how chemistry has affected the study microbiology
Answer:
because it's way to confusing and something that gets harder
What is an allele?
a
A type of cell.
b
A blood type.
С
A type of mutation.
d
A variation of a gene.
Answer:
D. a variation of a gene
Which equation represents a spontaneous reaction?
A) Ca + Ba2+ to Ca2+ + Ba
B) Co + Zn2+ to Co2+ + Zn
C) Fe + Mg2+ to Fe2+ + Mg
D) Mn + Ni2+ to Mn2+ + Ni
Answer:Mn+Ni2+-->Mn2+ + Ni
Explanation:
Castle Learning said it
How do you determine if the reaction is spontaneous?
If ΔH is negative, and –TΔS positive, the reaction will be spontaneous at low temperatures (decreasing the magnitude of the entropy term).
What is the meaning of spontaneous reaction?
When both of these conditions are met, the reaction occurs naturally. A spontaneous reaction is a reaction that favors the formation of products at the conditions under which the reaction is occurring.
Learn more about spontaneous reaction here : brainly.com/question/24376583
#SPJ2
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Sound travels at 340 m/s in dry air at room temperature. What is the
wavelength of sound waves with a frequency of 880 Hz under those
conditions?
Answer:
Wavelength of sound waves[tex]\ambda = 386[/tex] millimetres
Explanation:
The speed of any wave is equal to the product of its wavelength and frequency.
This can be represented mathematically as
[tex]V = f* \lambda[/tex]
Where
V is the speed of sound waves
f is the frequency of sound waves
and
[tex]\lambda[/tex] is the wavelength of the sound waves.
Substituting the given values in above equation we get -
[tex]340 = f * \lambda\\\lambda = \frac{340}{880} \\[/tex]
[tex]\lambda = 0.386[/tex] meters
[tex]\ambda = 386[/tex] millimetres
What is the molarity of 5.74 liters of solution made with 246 grams of iron (III) chloride (FeCl3)? Answer with 3 SDs.
Answer:
0.264 mol/L
Explanation:
Data obtained from the question includes:
Volume = 5.74L
Mass of FeCl3 = 246 g
Molarity =?
Next, we shall determine the number of mole in 246g of FeCl3.
This is illustrated below:
Mass of FeCl3 = 246g
Molar mass of FeCl3 = 56 + (35.5x3) = 162.5g/mol
Number of mole of FeCl3 =..?
Mole = Mass /Molar Mass
Number of mole of FeCl3 = 246/162.5
Number of mole of FeCl3 = 1.514 mol
Now, we can obtain the molarity of the solution as follow:
Molarity = mole /Volume
Volume = 5.74L
Mole of FeCl3 = 1.514 mol
Molarity = 1.514/5.74
Molarity = 0.264 mol/L
1- What do greenhouse gases do in our atmosphere? a. They absorb radiation given off by the Earth b They block harmful radiation from reaching the Earth c .They keep all the air within the Earth d .They make the Earth cooler
Answer: A. They absorb radiation given off by the earth.
Explanation: Green house gases are gases that have the capability of trapping the heat energy from the sun in our environment. These special attribute of these gases is what keeps our environment warm and sustain life as we know it. Example of Green House Gases include: carbon dioxide, water vapour and methane.
Answer:
A. THEY ABSORBS RADIATION GIVEN OFF BY THE EARTH.
Explanation:
Greenhouse gases are gases capable of absorbing and emitting infrared radiations in different wavelength range emitted by the earth. These gases include water vapor, carbon iv oxide, methane, ozone, chlorofluorocarbons, nitric oxide, hydrofluorocarbons. These gases contribute to the greenhouse effects and there actions are dependence on their respective characteristics, abundance in the atmosphere and the indirect effects it causes. Earth surfaces absorbs radiant energy from the sun and these radiations are reflected as light or reflected back to space as hear. Greenhouse gases are involved in absorbing and emitting these incoming energies in order to create a balance between the incoming and outgoing energies. This determines the temperature on the earth surface. The earth can be warm or cold depending on the direction the difference in this balance shifts. Without the greenhouse gases the average temperature of the earth will be lower than the expected temperature.